spandsp  0.0.6
v29tx_constellation_maps.h
1 /*
2  * SpanDSP - a series of DSP components for telephony
3  *
4  * v29tx_constellation_maps.h - ITU V.29 modem transmit part.
5  * Constellation mapping.
6  *
7  * Written by Steve Underwood <steveu@coppice.org>
8  *
9  * Copyright (C) 2008 Steve Underwood
10  *
11  * All rights reserved.
12  *
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU Lesser General Public License version 2.1,
15  * as published by the Free Software Foundation.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20  * GNU Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public
23  * License along with this program; if not, write to the Free Software
24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25  */
26 
27 #if !defined(FP_SCALE)
28 #if defined(SPANDSP_USE_FIXED_POINT)
29 #define FP_SCALE(x) ((int16_t) x)
30 #else
31 #define FP_SCALE(x) (x)
32 #endif
33 #endif
34 
35 #if defined(SPANDSP_USE_FIXED_POINT)
36 static const complexi16_t v29_abab_constellation[6] =
37 #else
38 static const complexf_t v29_abab_constellation[6] =
39 #endif
40 {
41  {FP_SCALE( 3.0f), FP_SCALE(-3.0f)}, /* 315deg high 9600 */
42  {FP_SCALE(-3.0f), FP_SCALE( 0.0f)}, /* 180deg low */
43  {FP_SCALE( 1.0f), FP_SCALE(-1.0f)}, /* 315deg low 7200 */
44  {FP_SCALE(-3.0f), FP_SCALE( 0.0f)}, /* 180deg low */
45  {FP_SCALE( 0.0f), FP_SCALE(-3.0f)}, /* 270deg low 4800 */
46  {FP_SCALE(-3.0f), FP_SCALE( 0.0f)} /* 180deg low */
47 };
48 
49 #if defined(SPANDSP_USE_FIXED_POINT)
50 static const complexi16_t v29_cdcd_constellation[6] =
51 #else
52 static const complexf_t v29_cdcd_constellation[6] =
53 #endif
54 {
55  {FP_SCALE( 3.0f), FP_SCALE( 0.0f)}, /* 0deg low 9600 */
56  {FP_SCALE(-3.0f), FP_SCALE( 3.0f)}, /* 135deg high */
57  {FP_SCALE( 3.0f), FP_SCALE( 0.0f)}, /* 0deg low 7200 */
58  {FP_SCALE(-1.0f), FP_SCALE( 1.0f)}, /* 135deg low */
59  {FP_SCALE( 3.0f), FP_SCALE( 0.0f)}, /* 0deg low 4800 */
60  {FP_SCALE( 0.0f), FP_SCALE( 3.0f)} /* 90deg low */
61 };
62 
63 #if defined(SPANDSP_USE_FIXED_POINT)
64 static const complexi16_t v29_9600_constellation[16] =
65 #else
66 static const complexf_t v29_9600_constellation[16] =
67 #endif
68 {
69  {FP_SCALE( 3.0f), FP_SCALE( 0.0f)}, /* 0deg low */
70  {FP_SCALE( 1.0f), FP_SCALE( 1.0f)}, /* 45deg low */
71  {FP_SCALE( 0.0f), FP_SCALE( 3.0f)}, /* 90deg low */
72  {FP_SCALE(-1.0f), FP_SCALE( 1.0f)}, /* 135deg low */
73  {FP_SCALE(-3.0f), FP_SCALE( 0.0f)}, /* 180deg low */
74  {FP_SCALE(-1.0f), FP_SCALE(-1.0f)}, /* 225deg low */
75  {FP_SCALE( 0.0f), FP_SCALE(-3.0f)}, /* 270deg low */
76  {FP_SCALE( 1.0f), FP_SCALE(-1.0f)}, /* 315deg low */
77  {FP_SCALE( 5.0f), FP_SCALE( 0.0f)}, /* 0deg high */
78  {FP_SCALE( 3.0f), FP_SCALE( 3.0f)}, /* 45deg high */
79  {FP_SCALE( 0.0f), FP_SCALE( 5.0f)}, /* 90deg high */
80  {FP_SCALE(-3.0f), FP_SCALE( 3.0f)}, /* 135deg high */
81  {FP_SCALE(-5.0f), FP_SCALE( 0.0f)}, /* 180deg high */
82  {FP_SCALE(-3.0f), FP_SCALE(-3.0f)}, /* 225deg high */
83  {FP_SCALE( 0.0f), FP_SCALE(-5.0f)}, /* 270deg high */
84  {FP_SCALE( 3.0f), FP_SCALE(-3.0f)} /* 315deg high */
85 };
86 
87 /*- End of file ------------------------------------------------------------*/
Definition: complex.h:88
Definition: complex.h:42